CN114508052A - Pier-beam assembly type integrated construction method - Google Patents
Pier-beam assembly type integrated construction method Download PDFInfo
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- CN114508052A CN114508052A CN202210042993.3A CN202210042993A CN114508052A CN 114508052 A CN114508052 A CN 114508052A CN 202210042993 A CN202210042993 A CN 202210042993A CN 114508052 A CN114508052 A CN 114508052A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The invention discloses a pier beam assembly type integrated construction method, which comprises the following steps: the method comprises the following steps: erecting 25m span prefabricated parts; step two: a 25m straddle bridge crane through hole; step three: erecting 16m span prefabricated parts; step four: the invention relates to a 16m cross-position bridge crane through hole, and relates to the technical field of bridge construction. The pier-beam assembly type integrated construction method realizes walking type via holes by redesigning and improving the traditional bridge girder erection machine and adopting the structural form of double main beams, five supporting legs and double hoisting trolleys, so that the pier-beam assembly type integrated construction method has the integrated erection function of erecting pier columns, capping beams, small box beams and double T-beams.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a pier-beam assembly type integrated construction method.
Background
The pier-beam assembly type integrated process is carried out by using the integrated bridge girder erection machine, and the pier-beam assembly type integrated process is widely applied to the construction of highway and railway bridges.
In the process of erectting, prefabricated component all adopts the transportation on the roof beam, compare with the loop wheel machine installation, need not set up the transportation pavement along the bridge, save construction in-process interim land used greatly, in addition, integration bridge girder erection machine adopts retractable landing leg, can install in succession in the great hillock area of fluctuation, the problem that the large-scale loop wheel machine of mountain area highway engineering construction can' T get into has been solved, but the walking via hole can not be realized in the current mound roof beam assembled integration construction of mound roof beam, do not have the integration of establishing the pier stud concurrently, the bent cap, the little case roof beam, two T roof beams operation and erect the function.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a pier-beam assembly type integrated construction method, which solves the problems that the existing pier-beam assembly type integrated construction can not realize walking type via holes and does not have the integrated erection function of pier column, capping beam, small box beam and double T-beam operation.
In order to achieve the purpose, the invention is realized by the following technical scheme: a pier-beam assembly type integrated construction method comprises the following steps:
the method comprises the following steps: erecting 25m span prefabricated parts;
step two: a 25m straddle bridge crane through hole;
step three: erecting 16m span prefabricated parts;
step four: and (5) passing through a 16m straddle bridge crane hole.
As a further scheme of the invention: the erection of the 25m span prefabricated part in the first step specifically comprises the following steps:
s1: after the bridge girder erection machine is in place, erecting a prefabricated capping beam on the left side of the 3# pier, and after the whole bridge girder erection machine transversely moves, erecting a prefabricated capping beam on the right side;
s2: erecting a prefabricated pier column of a No. 4 pier after the 3# bent cap is erected, and sequentially erecting all the prefabricated pier columns after the whole machine moves transversely;
s3: after the prefabricated pier stud of the No. 4 pier is erected, the prefabricated small box girders between the No. 1-2 piers are erected, and after the whole machine moves transversely, the prefabricated small box girders are erected in sequence.
As a further scheme of the invention: the 25m position-spanning bridge crane via hole in the second step specifically comprises the following steps:
a1: the front crane trolley and the rear crane trolley move to a position between the front support leg and the middle support leg, the rear support leg is contracted to be empty, and the front crane trolley and the rear crane trolley are longitudinally moved for 25m and then supported in place;
a2: the front auxiliary support leg, the middle support leg and the rear auxiliary support leg are contracted to empty, the front support leg and the rear support leg drive the main beam assembly to integrally longitudinally move by 25m to support in place, and the front trolley and the rear trolley synchronously retreat;
a3: and (4) the front supporting legs are contracted to empty, and are longitudinally moved by 25m to be supported in place, so that the hole passing of the whole machine is completed.
As a further scheme of the invention: the erection of the 16m span prefabricated part in the third step specifically comprises the following steps:
b1: erecting a prefabricated capping beam of a No. 4 pier;
b2: erecting prefabricated double T-shaped beams between 1# pier and 2# pier, transversely moving the whole machine, and sequentially erecting all the prefabricated double T-shaped beams.
As a further scheme of the invention: the 16m cross-position bridge crane via hole in the fourth step specifically comprises the following steps:
c1: the rear supporting legs are contracted to empty, the front lifting trolley and the rear lifting trolley are longitudinally moved for 16m and then supported at the beam ends in place, and the front lifting trolley and the rear lifting trolley are longitudinally moved between the middle supporting legs and the rear supporting legs;
c2: the middle supporting leg is contracted to empty and supported on the bent cap in place after longitudinally moving for 16 m;
c3: the rear auxiliary supporting legs are retracted to empty, the front supporting legs and the rear supporting legs drive the main beam assembly to longitudinally move for 16m, the two hoisting trolleys synchronously retreat, and the rear auxiliary supporting legs are supported in place;
c4: and (4) the front supporting legs are contracted to be emptied, longitudinally moved for 16m and then supported, and the machine moving through hole is completed.
As a further scheme of the invention: the pier-beam integrated bridge girder erection machine comprises a main girder assembly, a front auxiliary supporting leg, a front supporting leg, a middle supporting leg, a rear auxiliary supporting leg, a front crane trolley, a rear crane trolley, an electrical system and a hydraulic system.
As a further scheme of the invention: the lifting of the front crane trolley is 110T.
As a further scheme of the invention: the lifting of the rear crane trolley is 50T.
Each part of the pier-beam integrated bridge girder erection machine comprises a main beam assembly, a front auxiliary supporting leg, a front supporting leg, a middle supporting leg 4, a rear supporting leg, a rear auxiliary supporting leg, a front crane trolley, a rear crane trolley, an electrical system, a hydraulic system and the like.
The main beam assembly is in a truss type double-main-beam structure form and consists of two truss main beams and connecting cross beams at two ends. The single truss main beam consists of an upper chord member, a lower chord member and web members, a trolley rail is laid on the upper chord member, a hanging wheel and a riding wheel rail are laid on the upper cover plate and the lower cover plate of the lower chord member, a cross connection is arranged on the lower chord member of the truss at the corresponding position, and a vertical jack on the cross connection is used for locking a front/middle/rear supporting leg and a main beam bolt.
The front auxiliary supporting legs are positioned at the foremost end of the pier-beam integrated machine, the upper cross beam is arranged below the cross beam at the front end of the main beam, and the upper cross beam is in pin joint with the front end beam of the main beam through a span-variable oil cylinder; the function of the front auxiliary supporting legs is to level the downward deflection of the front end of the main beam when the main beam longitudinally moves through the hole, and the front supporting legs can be ensured to run on the front bearing platform.
The front supporting leg is supported on a front bearing platform and mainly comprises a supporting and hanging wheel mechanism, a longitudinal moving device, a bearing cross beam, a telescopic column, a bolt, a conversion sleeve, a walking wheel set and the like. The upper part of the triangular framework is provided with a small inclined strut, so that the inclined telescopic rod is driven to simultaneously perform telescopic motion when the telescopic oil cylinder contracts. The lower part of the small inclined support is connected with the plane framework through a long round hole, so that the stress of the inclined support is avoided when the front supporting leg works normally.
The middle support leg is a main support for a frame beam and a longitudinal moving hole of the pier-beam integrated machine and mainly comprises a hanging wheel supporting mechanism, a longitudinal moving device, a telescopic column, a transverse moving trolley and the like. The supporting and hanging wheel system consists of a supporting wheel, a change gear and a locking bolt. The riding wheels mainly play a role in supporting the main beam, load is transferred to the cross beam when the beam is erected, and rolling support is provided for the main beam when the main beam changes span; the hanging wheel is mainly used for hanging the supporting legs and driving the supporting legs to longitudinally move on the main beam so as to switch the supporting positions of the supporting legs; the locking bolt is used for fixedly connecting the support legs with the main beam when the span is changed or the whole machine moves.
The rear supporting leg is a rear support of a bridge girder erection machine, has a front-rear double-door frame structure and comprises a hanging wheel set, a riding wheel set, a longitudinal movement driving mechanism, a supporting leg, a rotary disc, a traveling wheel set and the like. The rear supporting leg is provided with a front row of upright posts and a rear row of upright posts, namely four upright posts, the front upright posts and the rear upright posts are rigidly connected into a whole, and two walking cross links are correspondingly arranged. And the bottom of the rear supporting leg is provided with a turntable for erecting a curved beam.
The rear auxiliary supporting leg consists of a transverse swinging oil cylinder, a door type supporting leg and a telescopic oil cylinder, the rear auxiliary supporting leg is connected with a main beam rear end beam, the transverse swinging oil cylinder mainly realizes transverse swinging of a rear auxiliary supporting leg door frame so as to realize that a rear auxiliary supporting leg curve frame beam is always supported on a line center, the supporting leg is of a door-shaped structure, and a beam carrying vehicle can carry beams through a fourth column. The stand is flexible nested structure, and flexible hydro-cylinder is installed inside the stand, realizes the post shaft altitude variation of back assistance landing leg through hydro-cylinder and a series of bolt hole for with girder leveling when great ramp. The rear auxiliary supporting legs mainly play a supporting role when the trolley takes the beam.
The front crane trolley mainly comprises a transverse trolley, a longitudinal-moving cart, a rotary lifting appliance, a steel wire rope, an electric hydraulic system and related accessories. The front crane trolley can longitudinally move and transversely move, and the trolley lifting appliance has a 360-degree rotation function. The front crane trolley is provided with two sets of winches, each winch is a built-in motor winch of a planetary gear reducer, the motor is provided with a braking device, and a hydraulic push rod brake is arranged between the motor and the reducer. The front crane trolley is mainly used for independently lifting the bearing cover beam, and the rear crane trolley lifts the pier stud, the small box beam and the double T-shaped beam.
The lifting appliance is provided with a plurality of adjusting oil cylinders, and the leveling function of the beam piece is realized through the transverse adjusting oil cylinder and the longitudinal adjusting oil cylinder. The 360-degree rotation of the lifting appliance is realized by adding one-stage open gear transmission through the speed reducing motor. The position of the suspender is steplessly adjustable, and the suspender can be adjusted to a corresponding position according to the hole position on each beam on site. The front crane trolley is provided with a rotary lifting appliance assembly which consists of a rotary assembly, a leveling assembly and a lifting frame.
The rear crane trolley mainly comprises a transverse trolley, a longitudinal trolley, a lifting appliance, a steel wire rope, an electric hydraulic system and related accessories. The front crane trolley can move longitudinally and transversely. The front crane trolley is provided with two sets of winches, each winch is a built-in motor winch of a planetary gear reducer, the motor is provided with a braking device, and a hydraulic push rod brake is arranged between the motor and the reducer. The rear trolley is mainly used for lifting and hanging pier columns, small box beams and double T-shaped beams with the front trolley.
The electric system comprises a PLC control system and a safety monitoring management system, wherein the PLC control system comprises a master station of a cab, a front crane trolley, a rear crane trolley, a front auxiliary supporting leg, a front supporting leg, a middle supporting leg, a rear auxiliary supporting leg and other subsystems as working slave stations, the hardware of the electric control system comprises an upper computer man-machine interface and a programmable controller, the technical parameter changes of each electric part and a monitored structural part are synchronously displayed by adopting multimedia means such as an LCD screen, sound and the like, the equipment state is provided for a driver, data parameters are confirmed through operation, information such as fault prompt and alarm is provided, and the safety device has safety devices such as emergency shutdown, electric appliance overload, open-phase leakage protection, zero-position protection and the like.
The design and installation of the hydraulic system of the pier-beam all-in-one machine meet the ISO and UNI standards, CETOP regulations and related industry execution standards, and various oil products are easy to purchase in domestic markets. The nominal pressure of all hydraulic components is at least higher than the system set pressure. The hydraulic pipeline adopts a steel pipe or a rubber pipe, the minimum anti-explosion coefficient of the high-pressure pipeline is 3, and the hydraulic connection meets the DIN2353 standard. All hydraulic components are necessary for rain protection. The hydraulic circuit is provided with a common filter and a filter device for cleaning the hydraulic oil. All the pipelines are flame-retardant and are suitable for being installed on machinery. The hydraulic circuit is equipped with a relief valve to limit the maximum working pressure in the oil circuit. A pressure gauge is provided at an appropriate location to check the operating pressure.
Compared with the prior art, the invention has the following beneficial effects:
1. the walking type through hole is realized by redesigning and improving the traditional bridge girder erection machine and adopting the structural form of double main beams, five supporting legs and double hoisting trolleys, so that the walking type through hole has the integrated erection function of erecting pier columns, capping beams, small box beams and double T-beams.
2, the invention adopts pier-beam assembly type integrated construction, can improve the construction efficiency, accelerate the construction speed, relieve the shortage of the construction period and solve the problem of heavy construction task, the project has two forms of 16m double T-beams in the form of the prestressed pipe pile and the cover beam in the form of a lower structure, 5 single-hole double T-beams without a cast-in-place cushion cap and 25m small box beams in the form of the column cover beam in the form of a lower structure, and the lower structure is in the form of column cover beam splicing and is divided into three forms of 2 columns, 1 cover beam, 4 box beams, 3 columns, 3 cover beams, 7 box beams and 4 columns, 2 cover beams and 8 box beams, the total number of the prefabricated cover beams is 390, the prefabricated pier columns are 687, and the prefabricated beam plates 2391 are all prefabricated in a prefabricated field and then transported to the construction field, the construction task is heavy, the synchronous construction of the upper part and the lower part of the bridge is realized, the construction period is not delayed due to the process conversion, the construction efficiency is improved, and the use cost is reduced.
3. Adopt mound roof beam assembled integration construction, can improve mound roof beam structure construction facility worker's precision, adopt the crane to hoist and mount first span beam slab as mound roof beam integration bridging machine starting platform, integration bridging machine track is laid along first span beam slab both sides, the scene sets up the bale handle station, prefabricated component transports to the bale handle station after, on the fortune roof beam gun wagon on the bridge floor is transported to through the bale handle portal crane, adopt the mode of transporting the roof beam on the roof beam to transport to bridging machine rear end feed beam, because bridging machine can control the position that the mound roof beam is indulged lateral shifting in a flexible way according to track cooperation overhead traveling crane etc. of all-in-one installation, for traditional crane hoist and mount, adopt mound roof beam assembled integration to carry out pier stud installation and roof beam slab erection construction and can fix a position rapidly, accurate ann falls in measuring laying a pattern assigned position.
4. The pier-girder assembly type integrated construction is adopted, the pier-girder erection installation construction safety can be improved, the high-altitude hoisting operation risk is reduced, the pier-girder integrated bridging machine girder is in a truss type double-girder structural form and comprises two truss girders and connecting cross beams at two ends, a single truss girder comprises an upper chord, a lower chord and web members, a trolley track is laid on the upper chord, a hanging wheel and a riding wheel track are laid on the upper chord and the lower chord, a cross connection is arranged on the lower chord at the corresponding position of the truss, a vertical jack on the cross connection is used for locking a front support leg, a middle support leg and a rear support leg with a girder bolt, a single truss girder can be divided into a plurality of sections for transportation, the sections are connected by pin shafts, the truss cross beams are connected inside two sides of the end of the girder, so that the girder becomes a rectangular frame, the wind resistance of the integrated bridging machine is improved, and the stability and the wind resistance of the bridging machine are enhanced, meanwhile, the pier-beam integrated bridge girder erection machine can reduce the hoisting distance of the prefabricated part compared with the traditional crane hoisting erection, so that the pier-beam erection safety is improved.
5. The pier-beam integrated construction is adopted, the interference to the existing traffic and environment is reduced, the pressure of site traffic organization is relieved, the project is a reconstruction and extension project, the pier-beam assembly type integrated construction can reduce the interference to the existing traffic, the structure is prefabricated in a prefabricated field, transported to the site and installed by the pier-beam integrated machine, the problem that the existing traffic is obstructed due to the fact that mechanical equipment adopted during construction of a cast-in-place structure is blocked is avoided, and meanwhile the problem of temporary land acquisition under a bridge is solved.
6. Adopt pier roof beam assembled integrative machine to construct, reduce other equipment and personnel and drop into, practice thrift timber-machine use cost.
7. The prefabricated pier beam only needs pier beam integrated erection for construction, so that the land occupation of other equipment is reduced, the integrated bridge girder erection machine is installed on the first beam plate, the landing is not needed, and the land acquisition problem is reduced, so that the interference on surrounding traffic and environment is reduced, the surrounding environment is prevented from being damaged, the environment is protected, the land occupation range is reduced, the interference on the existing traffic and environment is reduced, the construction method can furthest protect valuable mountain vegetation and good farmland, the adverse influence on the surrounding natural environment and traffic is reduced, and the social benefit is maximized.
8. The pier-beam integrated bridge girder erection machine is adopted for construction, 3 days/1 hole can be realized, the construction and erection continuity is realized, the problem of shortage of the precast yard girder storage yard is effectively solved, the pier-beam storage space of the precast yard is reduced, and the girder outgoing speed of the precast yard is indirectly improved.
9. The conversion type of the supporting leg pad is considered during design, the supporting leg pad is required to be arranged on a bearing platform in one case, the supporting leg pad is required to be arranged on the pile top in one case, and the requirements of adjusting the position of the supporting leg during two spans of 25m and 16m are met.
Drawings
FIG. 1 is a plan view of the pier-beam integrated bridge girder erection machine of the present invention;
FIG. 2 is a schematic view of a pier-beam integrated bridge girder erection machine in the direction C;
FIG. 3 is a schematic view of the pier-beam integrated bridge girder erection machine in a direction D;
FIG. 4 is a schematic view of the structural connection of the rear trolley of the present invention;
FIG. 5 is a schematic view of the structural connection of the front trolley of the present invention;
FIG. 6 is a schematic structural connection of the main beam assembly of the present invention;
FIG. 7 is an elevation view of a front crane trolley of the pier-beam integrated bridge girder erection machine;
FIG. 8 is a schematic view of step S1 of the first step of the present invention;
FIG. 9 is a schematic view of step S2 of the first step of the present invention;
FIG. 10 is a schematic view of step S3 of the first step of the present invention;
FIG. 11 is a diagram illustrating step A1 according to the present invention;
FIG. 12 is a schematic view of A2 in step two of the present invention;
FIG. 13 is a schematic view of A3 in step two of the present invention;
FIG. 14 is a schematic view of step three B1 of the present invention;
FIG. 15 is a schematic view of step three B2 of the present invention;
FIG. 16 is a schematic view of step four, C1, according to the present invention;
FIG. 17 is a schematic view of step four, C2, according to the present invention;
FIG. 18 is a schematic view of step four, C3, according to the present invention;
FIG. 19 is a diagram of step four, C4, according to the present invention.
In the figure: 1. a main beam assembly; 2. front auxiliary supporting legs; 3. a front leg; 4. a middle support leg; 5. a rear leg; 6. a rear auxiliary supporting leg; 7. a front trolley; 8. and a rear crane trolley.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
Referring to fig. 1-19, the present invention provides a technical solution: the pier beam assembly type integrated construction method comprises the following steps:
the method comprises the following steps: the 25m span prefabricated part erection specifically comprises the following steps:
s1: after the bridge girder erection machine is in place, erecting a prefabricated capping beam on the left side of the 3# pier, and after the whole bridge girder erection machine transversely moves, erecting a prefabricated capping beam on the right side;
s2: erecting a prefabricated pier column of a No. 4 pier after the 3# bent cap is erected, and sequentially erecting all the prefabricated pier columns after the whole machine moves transversely;
s3: erecting prefabricated small box girders between No. 1-No. 2 piers after erecting the prefabricated pier stud of the No. 4 pier, and sequentially erecting the prefabricated small box girders after the whole machine transversely moves;
step two: the erection of the 16 m-span prefabricated part in the third step of the hole passing of the 25 m-span position bridge crane specifically comprises the following steps:
a1: the front crane trolley 7 and the rear crane trolley 8 move to a position between the front supporting leg 3 and the middle supporting leg 4, the rear supporting leg 5 contracts to be emptied, and the front crane trolley and the rear crane trolley are longitudinally moved for 25m and then are supported in place;
a2: the front auxiliary supporting leg 2, the middle supporting leg 4 and the rear auxiliary supporting leg 6 are contracted to empty, the front supporting leg 3 and the rear supporting leg 5 drive the main beam assembly 1 to integrally longitudinally move for 25m to support in place, and the front trolley 7 and the rear trolley 8 synchronously retreat;
a3: the front supporting leg 3 is contracted to empty, and the method specifically comprises the following steps:
b1: erecting a prefabricated capping beam of a No. 4 pier;
b2: erecting prefabricated double T-shaped beams between 1# pier and 2# pier, transversely moving the whole machine, and sequentially erecting all the prefabricated double T-shaped beams;
step four: the 16m cross-position bridge crane via hole concretely comprises the following steps:
c1: the rear support legs 5 are contracted to be emptied, the front lifting trolley 7 and the rear lifting trolley 8 are longitudinally moved for 16m and then supported at the beam ends in place, and the front lifting trolley and the rear lifting trolley are longitudinally moved between the middle support legs 4 and the rear support legs 5;
c2: the middle supporting leg 4 is contracted to empty, longitudinally moved for 16m and supported on the bent cap in place;
c3: the rear auxiliary supporting legs 6 are contracted to empty, the front supporting legs 3 and the rear supporting legs 5 drive the main beam assembly 1 to longitudinally move for 16m, the two hoisting trolleys synchronously retreat, and the rear auxiliary supporting legs 6 support in place;
c4: the front supporting leg 3 is contracted to empty and supported after being longitudinally moved for 16m, and the machine moving through hole is completed, so that the construction efficiency can be improved, the construction speed is accelerated, the construction period is shortened, the problems of quick and efficient installation of a pier stud, construction precision improvement, safety and stability improvement, land acquisition, reduction of interference to traffic, safety, environmental protection and the like are solved.
Each part of the pier-beam integrated bridge girder erection machine comprises a main girder assembly 1, a front auxiliary supporting leg 2, a front supporting leg 3, a middle supporting leg 4, a rear supporting leg 5, a rear auxiliary supporting leg 6, a front crane trolley 7, a rear crane trolley 8, an electrical system, a hydraulic system and the like.
The main beam assembly 1 is in a truss type double-main-beam structure form and is composed of two truss main beams and connecting cross beams at two ends. The single truss main beam consists of an upper chord member, a lower chord member and web members, a trolley rail is laid on the upper chord member, a hanging wheel and a riding wheel rail are laid on the upper cover plate and the lower cover plate of the lower chord member, a cross connection is arranged on the lower chord member of the truss at the corresponding position, and a vertical jack on the cross connection is used for locking the front/middle/rear support leg 5 and a main beam bolt.
The front auxiliary supporting legs 2 are positioned at the foremost end of the pier beam integrated machine, the upper cross beam is arranged below the cross beam at the front end of the main beam, and the upper cross beam is in pin joint with the front end beam of the main beam through a variable span oil cylinder; the front auxiliary supporting legs 2 have the function of leveling the downward deflection of the front ends of the main beams when the main beams longitudinally move through the holes, and the front supporting legs 3 can be ensured to run to a front bearing platform.
The front supporting leg 3 is supported on a front bearing platform and mainly comprises a supporting and hanging wheel mechanism, a longitudinal moving device, a bearing cross beam, a telescopic column, a bolt, a conversion sleeve, a walking wheel set and the like. The upper part of the triangular framework is provided with a small inclined strut, so that the inclined telescopic rod is driven to simultaneously perform telescopic motion when the telescopic oil cylinder contracts. The lower part of the small inclined support and the plane framework are provided with long round holes, so that the stress of the inclined support when the front supporting leg 3 works normally is avoided.
The middle support leg 4 is a main support for erecting a beam and longitudinally moving a through hole of the pier-beam all-in-one machine and mainly comprises a riding wheel mechanism, a longitudinally moving device, a telescopic column, a transverse moving trolley and the like. The supporting and hanging wheel system consists of a supporting wheel, a change gear and a locking bolt. The riding wheels mainly play a role in supporting the main beam, load is transferred to the cross beam when the beam is erected, and rolling support is provided for the main beam when the main beam changes span; the hanging wheel is mainly used for hanging the supporting legs and driving the supporting legs to longitudinally move on the main beam so as to switch the supporting positions of the supporting legs; the locking bolt is used for fixedly connecting the support legs with the main beam when the span is changed or the whole machine moves.
The rear support leg 5 is a rear support of a bridge girder erection machine, has a front-rear double-door frame structure and comprises a hanging wheel set, a riding wheel set, a longitudinal movement driving mechanism, a support leg, a rotary table, a traveling wheel set and the like. The rear supporting leg 5 is provided with a front row of upright posts and a rear row of upright posts, namely four upright posts, the front upright posts and the rear upright posts are rigidly connected into a whole, and two walking cross links are correspondingly arranged. And the bottom of the rear supporting leg 5 is provided with a turntable for erecting a curved beam.
The rear auxiliary supporting legs 6 are composed of a transverse swinging oil cylinder, door type supporting legs and telescopic oil cylinders, the rear auxiliary supporting legs 6 are connected with a main beam rear end beam, the transverse swinging oil cylinder mainly realizes transverse swinging of a rear auxiliary supporting leg 6 door frame so as to realize that the rear auxiliary supporting legs 6 are always supported on a line center when curved frame beams are erected, the supporting legs are of door-shaped structures, and a beam transporting vehicle can carry beams through a fourth column. The stand is flexible nested structure, and flexible hydro-cylinder is installed inside the stand, realizes the post shaft altitude variation of back auxiliary leg 6 through hydro-cylinder and a series of bolt hole for with girder leveling when great ramp. The rear auxiliary supporting legs 6 mainly play a supporting role when the trolley takes the beam.
The front crane trolley 7 mainly comprises a transverse trolley, a longitudinal trolley, a rotary lifting appliance, a steel wire rope, an electric hydraulic system and related accessories. The front crane trolley 7 can move longitudinally and transversely, and the trolley lifting appliance has a 360-degree rotation function. The front crane trolley 7 is provided with two sets of winches which are built-in motor winches of a planetary gear reducer, the motors are provided with braking devices, and a hydraulic push rod brake is arranged between the motors and the reducer. The front crane trolley 7 is mainly used for lifting the bearing cover beam independently, and the rear crane trolley 8 is used for lifting the pier stud, the small box beam and the double T-shaped beam.
The lifting appliance is provided with a plurality of adjusting oil cylinders, and the leveling function of the beam piece is realized through the transverse adjusting oil cylinder and the longitudinal adjusting oil cylinder. The 360-degree rotation of the lifting appliance is realized by adding one-stage open gear transmission through the speed reducing motor. The position of the suspender is steplessly adjustable, and the suspender can be adjusted to a corresponding position according to the hole position on each beam on site. The front lifting trolley 7 is provided with a rotary lifting appliance assembly which consists of a rotary assembly, a leveling assembly and a lifting frame.
The rear crane trolley 8 mainly comprises a transverse trolley, a longitudinal trolley, a lifting appliance, a steel wire rope, an electric hydraulic system and related accessories. The front crane trolley 7 can move longitudinally and transversely. The front crane trolley 7 is provided with two sets of winches which are built-in motor winches of a planetary gear reducer, the motors are provided with braking devices, and a hydraulic push rod brake is arranged between the motors and the reducer. The rear trolley 8 is mainly used for lifting and hanging pier columns, small box girders and double T-shaped girders with the front trolley 7.
The electrical system comprises a PLC control system and a safety monitoring management system, wherein the PLC control system comprises a master station of a cab, a front lifting trolley 8, a rear lifting trolley 8, a front auxiliary supporting leg 2, a front supporting leg 3, a middle lifting trolley, a rear supporting leg 5, a rear auxiliary supporting leg 6 and other subsystems as work slave stations, the hardware of the electrical control system comprises an upper computer human-computer interface and a programmable controller, the technical parameter changes of each electrical part and a monitored structural part are synchronously displayed by adopting multimedia means such as an LCD screen, sound and the like, the equipment state is provided for a driver, data parameters are confirmed through operation, information such as fault prompt, alarm and the like, and the safety device comprises safety devices such as emergency shutdown, electrical appliance overload, open-phase leakage protection, zero position protection and the like.
The design and installation of the hydraulic system of the pier-beam all-in-one machine meet the ISO and UNI standards, CETOP regulations and related industry execution standards, and various oil products are easy to purchase in domestic markets. The nominal pressure of all hydraulic components is at least higher than the system set pressure. The hydraulic pipeline adopts a steel pipe or a rubber pipe, the minimum anti-explosion coefficient of the high-pressure pipeline is 3, and the hydraulic connection meets the DIN2353 standard. All hydraulic components are necessary for rain protection. The hydraulic circuit is provided with a common filter and a filter device for cleaning the hydraulic oil. All the pipelines are flame-retardant and are suitable for being installed on machinery. The hydraulic circuit is equipped with a relief valve to limit the maximum working pressure in the oil circuit. A pressure gauge is provided at an appropriate location to check the operating pressure.
The prefabricated bridge of assembling totally 3, assembled bridge superstructure adopts prestressed concrete little box girder, prestressed concrete two T roof beams, and the substructure adopts prefabricated bent cap, prefabricated square pier and cast-in-place cushion cap, and in pier-beam integration bridging machine construction range, there are two kinds of bridge structural style simultaneously: (1)16m double T beams, wherein the lower structure is in the form of a prestressed pipe pile and a capping beam, and the single-hole double T beams comprise 5 pieces and are not provided with a cast-in-situ bearing platform; (2)25 meters of small box girders, the lower structure is a form of splicing upright posts and bent caps, and is divided into 2 posts, 1 bent cap, 4 box girders, 3 posts, 7 box girders, and 4 posts, 2 bent caps, 8 box girders, a cast-in-place bearing platform is provided, total 390 prefabricated bent caps are provided, 687 prefabricated pier posts are provided, 2391 prefabricated beam plates are provided, all the prefabricated beams are transported to a construction site after being prefabricated in a centralized manner in a prefabricated field, and a pier-beam integrated bridge girder erection machine is adopted for installation and erection.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A pier-beam assembly type integrated construction method is characterized in that: the method comprises the following steps:
the method comprises the following steps: erecting 25m span prefabricated parts;
step two: a 25m straddle bridge crane through hole;
step three: erecting 16m span prefabricated parts;
step four: and 16m is used for bridging through holes.
2. The pier beam assembly type integrated construction method according to claim 1, wherein the pier beam assembly type integrated construction method is characterized in that: the erection of the 25m span prefabricated part in the first step specifically comprises the following steps:
s1: after the bridge girder erection machine is in place, erecting a prefabricated capping beam on the left side of a No. 3 pier, and after the whole bridge girder erection machine moves transversely, erecting a prefabricated capping beam on the right side;
s2: erecting a prefabricated pier column of a No. 4 pier after the 3# bent cap is erected, and sequentially erecting all the prefabricated pier columns after the whole machine moves transversely;
s3: after the prefabricated pier stud of the No. 4 pier is erected, the prefabricated small box girders between the No. 1-2 piers are erected, and after the whole machine moves transversely, the prefabricated small box girders are erected in sequence.
3. The pier beam assembly type integrated construction method according to claim 1, characterized in that: the 25m cross-position bridge machine via hole in the second step specifically comprises the following steps:
a1: the front crane trolley (7) and the rear crane trolley (8) move to a position between the front supporting leg (3) and the middle supporting leg (4), the rear supporting leg (5) shrinks to empty, and the front crane trolley and the rear crane trolley move longitudinally for 25m and then are supported in place;
a2: the front auxiliary supporting leg (2), the middle supporting leg (4) and the rear auxiliary supporting leg (6) shrink to empty, the front supporting leg (3) and the rear supporting leg (5) drive the main beam assembly (1) to integrally longitudinally move for 25m to support in place, and the front hoisting trolley (7) and the rear hoisting trolley (8) synchronously retreat;
a3: the front supporting legs (3) shrink to empty, move longitudinally by 25m and support in place, and complete machine hole passing is completed.
4. The pier beam assembly type integrated construction method according to claim 1, wherein the pier beam assembly type integrated construction method is characterized in that: the erection of the 16m span prefabricated part in the third step specifically comprises the following steps:
b1: erecting a prefabricated capping beam of a No. 4 pier;
b2: erecting prefabricated double T-shaped beams between 1# pier and 2# pier, transversely moving the whole machine, and sequentially erecting all the prefabricated double T-shaped beams.
5. The pier beam assembly type integrated construction method according to claim 1, wherein the pier beam assembly type integrated construction method is characterized in that: the 16m cross-position bridge crane via hole in the fourth step specifically comprises the following steps:
c1: the rear support legs (5) are contracted to empty, the front crane trolley (7) and the rear crane trolley (8) are longitudinally moved to positions after being longitudinally moved for 16m and are supported at the beam ends, and the front crane trolley and the rear crane trolley are longitudinally moved between the middle support legs (4) and the rear support legs (5);
c2: the middle supporting leg (4) is contracted to empty, longitudinally moved for 16m and supported on the bent cap in place;
c3: the rear auxiliary supporting legs (6) are retracted to empty, the front supporting legs (3) and the rear supporting legs (5) drive the main beam assembly (1) to longitudinally move for 16m, the two hoisting trolleys synchronously retract, and the rear auxiliary supporting legs (6) support in place;
c4: the front supporting legs (3) shrink to empty and support after longitudinally moving for 16m, and the machine moving through hole is completed.
6. The pier beam assembly type integrated construction method according to claim 1, wherein the pier beam assembly type integrated construction method is characterized in that: the bridge girder erection machine comprises a main girder assembly (1), a front auxiliary supporting leg (2), a front supporting leg (3), a middle supporting leg (4), a rear supporting leg (5), a rear auxiliary supporting leg (6), a front crane trolley (7), a rear crane trolley (8), an electrical system and a hydraulic system.
7. The pier beam assembly type integrated construction method according to claim 6, wherein the pier beam assembly type integrated construction method is characterized in that: the lifting of the front crane trolley (7) is 110T.
8. The pier beam assembly type integrated construction method according to claim 6, wherein the pier beam assembly type integrated construction method is characterized in that: the lifting of the rear lifting trolley (8) is 50T.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116289573A (en) * | 2023-02-14 | 2023-06-23 | 保利长大工程有限公司 | Multi-span continuous operation pier-beam integrated bridge girder erection machine and rapid bridge girder erection method |
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